/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 60px 0;
}

/* 导航栏 - 极简风格 */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    padding: 15px 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c3e50;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
}

.nav-menu li {
    margin-left: 30px;
}

.nav-menu a {
    color: #2c3e50;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: #3498db;
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #2c3e50;
}

/* 英雄区域 */
.hero {
    padding-top: 120px;
    text-align: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 0 0 20px 20px;
    margin-bottom: 40px;
}

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    color: #2c3e50;
}

.hero p {
    font-size: 1.2rem;
    color: #7f8c8d;
    max-width: 700px;
    margin: 0 auto 30px;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: #3498db;
    border: 2px solid #3498db;
}

.btn-secondary:hover {
    background-color: #3498db;
    color: white;
}

/* 通用卡片样式 */
.card {
    background-color: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
    height: 100%;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* 关于区域 */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
    align-items: center;
}

.about-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.about-content h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: #2c3e50;
}

.about-content p {
    margin-bottom: 20px;
    color: #555;
}

/* 技能区域 */
.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2rem;
    color: #2c3e50;
    position: relative;
    display: inline-block;
    padding-bottom: 10px;
}

.section-title h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: #3498db;
}

.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}

.skill-item h3 {
    margin-bottom: 15px;
    color: #2c3e50;
}

.skill-bar {
    height: 10px;
    background-color: #ecf0f1;
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 20px;
}

.skill-progress {
    height: 100%;
    background-color: #3498db;
    border-radius: 5px;
    width: 0;
    transition: width 1.5s ease-in-out;
}

/* 项目区域 */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.project-card h3 {
    margin-bottom: 15px;
    color: #2c3e50;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 15px;
}

.tag {
    background-color: #ecf0f1;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: #2c3e50;
}

/* 联系区域 */
.contact-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.contact-info h3 {
    margin-bottom: 20px;
    color: #2c3e50;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.contact-icon {
    width: 40px;
    height: 40px;
    background-color: #3498db;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.social-link {
    width: 45px;
    height: 45px;
    background-color: #f8f9fa;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #2c3e50;
    text-decoration: none;
    transition: all 0.3s;
}

.social-link:hover {
    background-color: #3498db;
    color: white;
    transform: translateY(-5px);
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-control {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #3498db;
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

/* 页脚 */
footer {
    background-color: #2c3e50;
    color: white;
    padding: 50px 0 20px;
    text-align: center;
}

.footer-content {
    margin-bottom: 30px;
}

.copyright {
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        max-width: 400px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        transition: all 0.3s;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .nav-menu li {
        margin: 15px 0;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }
    
    section {
        padding: 40px 0;
    }
    
    .card {
        padding: 20px;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.8s ease-out;
}

/* 工具类 */
.text-center {
    text-align: center;
}

.mb-20 {
    margin-bottom: 20px;
}

.mt-20 {
    margin-top: 20px;
}

.mb-30 {
    margin-bottom: 30px;
}

.mt-30 {
    margin-top: 30px;
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #121212;
        color: #e0e0e0;
    }
    
    header {
        background-color: rgba(30, 30, 30, 0.95);
    }
    
    .logo, .nav-menu a {
        color: #e0e0e0;
    }
    
    .hero {
        background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    }
    
    .hero h1 {
        color: #e0e0e0;
    }
    
    .hero p {
        color: #b0b0b0;
    }
    
    .card {
        background-color: #1e1e1e;
        color: #e0e0e0;
    }
    
    .section-title h2, .about-content h2, .skill-item h3, .project-card h3, .contact-info h3 {
        color: #e0e0e0;
    }
    
    .about-content p {
        color: #b0b0b0;
    }
    
    .skill-bar {
        background-color: #2d2d2d;
    }
    
    .tag {
        background-color: #2d2d2d;
        color: #e0e0e0;
    }
    
    .social-link {
        background-color: #2d2d2d;
        color: #e0e0e0;
    }
    
    .form-control {
        background-color: #2d2d2d;
        color: #e0e0e0;
        border-color: #444;
    }
}